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Submission #733828

# Submission time Handle Problem Language Result Execution time Memory
733828 2023-05-01T10:48:04 Z vjudge1 Lightning Rod (NOI18_lightningrod) C++17
4 / 100
 1721 ms 159120 KB 
#include<bits/stdc++.h>
#define IOS ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);
#define int long long
#define F first
#define S second
#define pb push_back

using namespace std;

stack<pair<int, int > > st;

int check(pair<int, int > a, pair<int, int > b) {
	int c = b.F - a.F;
	if (a.S - b.S >= c) return 1;
	if (b.S - a.S >= c) return 2;
	return 0;
}

void solve() {
	int n; cin >> n;
	for (int i = 0; i < n; i++) {
		int a, b; cin >> a >> b;
		if (i == 0) {st.push({a, b}); continue ;}
		while (!st.empty()) {
			int x = check(st.top(), {a, b});
			if (x == 2) st.pop();
			else if (x == 1) break ;
			else {st.push({a, b}); break ;}
		}
	}
	cout << st.size();
}
signed main(){IOS solve(); return 0;}

Subtask #1
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 1535 ms 159120 KB Output is correct
2 Correct 1721 ms 158824 KB Output is correct
3 Correct 1631 ms 154476 KB Output is correct

Subtask #2
0 / 7.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 212 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 12.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 212 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 21.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 212 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 26.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 212 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 1370 ms 300 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #7
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1535 ms 159120 KB Output is correct
2 Correct 1721 ms 158824 KB Output is correct
3 Correct 1631 ms 154476 KB Output is correct
4 Incorrect 0 ms 212 KB Output isn't correct
5 Halted 0 ms 0 KB -